Title:
電子写真現像剤用磁性キャリアの製造方法及び二成分系現像剤の製造方法
Document Type and Number:
Japanese Patent JP5924486
Kind Code:
B2
Abstract:
The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin, and having an average particle diameter of 20 to 60 µ m, the magnetic carrier for an electrophotographic developer satisfying the formula (1): à 1 - à 0 = -2 to 0 wherein à 0 represents a saturation magnetization (Am 2 /kg) of the carrier particles having a particle diameter in the vicinity of the average particle diameter of the magnetic carrier for an electrophotographic developer; and à 1 represents a saturation magnetization (Am 2 /kg) of the carrier particles having a particle diameter of less than 20 µ m, and a two-component system developer using the magnetic carrier. The two-component system developer of the present invention includes a magnetic carrier used for an electrophotographic developer which can exhibit a good durability, is free from occurrence of carrier adhesion, and can maintain a high quality of images produced for a long period of time, and comprises the magnetic carrier for an electrophotographic developer and a toner.
Inventors:
Kinoshita incense
Eiichi Kurita
Eiichi Kurita
Application Number:
JP2012125449A
Publication Date:
May 25, 2016
Filing Date:
May 31, 2012
Export Citation:
Assignee:
Toda Kogyo Co., Ltd.
International Classes:
G03G9/107; G03G9/113
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